Micrometer-gage.



No. 747,224. A PATENTED DEG. 15, 1903. A. MEPPEL. MIGROMBTBR GAGE.

. APPLICATION FILED APR. Z1. 1903. H0 MODEL.

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"UNITEDY STATESA Patented December 15, 1903.

PATENT OFFICE.

MlCRQMETER-GAGE.

SPECIFICATION forming part of Letters Patent N10. 747,224, dated December 15, 1903. Application filed April 21, 1903. Serial No. 153,613. (No model.)

To @ZZ whom it may concern.-

Beit known that I, AUGUST RIEFFEL, a citizen of the United States, and a resident of the city and county of Philadelphia,State of Pennsylvania, have invented certain new and useful Improvements in Micrometer-Gages, of which the following is a specification.

My invention refers to improvements in micrometer-gages; and the object of my invention is to furnish a combination gage which may be used either as a depth or caliper gage. y y

In Letters Patent of the United States No. 716,279, issued to me on December 16, 1902, is described and claimed a micrometer depthgage comprising a frame having a horizontal and a vertical limb rigidly connected, the latter carrying a movable sleeve threaded at its upper end and normally forced downward by a spring. The movable sleeve carries a graduated rod which can be moved up and down in it, and means are provided for locking the rod to the sleeve and for locking them both to the vertical limb of the frame. The threaded part of the sleeve carries a graduated nut, forming the micrometer.

My present invention is intended principally for use in connection with my former one; but it will be understood that I do not desire to confine myself entirely to its use, as the attachment may be'used in connection with any other depth-gage of the same class.

In the accompanying drawings, forming part of this specification, and in which similar characters of reference indicate similar parts throughout the several views, Figure l is a side elevation of a micrometer depth-gage furnished with my caliper attachment; Fig. 2, a sectional side elevation of a micrometer depth-gage; Fig. 3, a plan of Fig. l; Fig. 4, a section of Fig. 1 on line 4 4, showing a front elevation of the caliper attachment; Fig. 5, a perspective view of the caliper attachment; Fig. 6, an enlarged vertical central sectional elevation through the head of the depth-gage.

a is the horizontal, and b the vertical, limb of a micrometer depth-gage, the latter of which is bored out, forming a chamber d to receive a movable sleeve e, the lower end of which carries a shoulder f and the upper part of which is furnished with a fine thread g. h is a graduated rod passing through the vertical axis of sleeve e. j is a cap through which sleeve e passes and which closes the upper end of chamber d. Zis a spring, one end of which bears against lower end of cap j and the other against upper end of shoulder fand which normally tends to force the sleeve e downward. k is a nut furnished with graduations lo', carried by thread g on sleeve e and forming therewith a micrometer adjustment for sleeve e and rod h. m is a set-screw passing through a slot n in limb b and through sleeve e, which carries it and which is adapted to engage and lock the rod h to the sleeve. o is a jam-nut for locking the screw m and sleeve e to the frame of the device. All these parts having been fully described in my patent above referred to, it will be unnecessary to more fully describe them here.

To convert my depth-gage into a caliper- `gage, I furnish an arm 1, the upper part of which is slotted, as shown at 2, so as to pass over the horizont-al limb a of the depth-gage, and the lower end of which is furnished with the usual screw 3, which when the arm l is in place on the limb a is directly beneath the rod h for adjustment. The upper end of the arm l may be furnished with sides or lugs 4 and with a slit 5, so that a screw 6 may be used to lock the arm to the limb o f the depthgage, this arrangement forming a clamp; but any other means for securing the parts a and l may be used.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. The combination with a micrometer depth-gage comprising a frame having a horizontal and a vertical limb, a graduated rod and a micrometer-screw by means of which said rod may be raised or lowered, of a detachable arm furnished with a slot at its upper end adapted to pass over the horizontal limb of said depth-gage, and means whereby said arm may be rigidly secured to said limb.

2. The combination. with a micrometer limbof said depth-gage, with lugs 4, and a, depth-gage,comprisingaframe havingahoriscrew by means of which said lugs may be zontal and a vertical limb,V a graduated rod brought together to lock said arm tosaid limb. Io

and a. micrometer-screw by means of which AUGUST RIEFFEL. 5 said rod may be raised or lowered, of a devWitnesses:

tachable arm furnished at its upper end with EDW. PARKINSON,

a. slot adapted to pass over the horizontal ARTHUR PARKINSON. 

